Even before episode 23, some people are apparently confused about Quinza's gender.

Unless I missed something in episode 23 and other episodes, there's been nothing to imply or outright state that Quinza is anything other than male.

Just because a character has long hair doesn't make them female.

And again, unless I'm missing things...there's been _ nothing _ in the series that implies or outright claims he is a she.

First of all, the voice actor is very obviously a male.

"Koyasu is known for his deep, smooth voice, which often lands him in roles that are either villains or lonely bishōnen"

Other characters refer to Quinza as "he" , "him" , "big brother" "master quinza" , ect. All these things are usually reserved for males. People rarely call a female "master" or "brother" , it's usually things like "mistress" and "sister".

Even in the wikipedia article there's no confusion about Quinza's gender, it is correctly being given as male.

I think even with all those robes and stuff they wear it shouldn't be that hard for you people to tell who is male and who is female. Seriously.

Everybody else gets it, that he's a guy, so why are some of you still in doubt?